Graphenea Graphene Multiplies Power Of Light

Team Graphenea has once again worked in
close collaboration with research scientists and published another
high-impact scientific paper. Our most recent publication, in last
month's edition of Nature Physics, shows multiplication of electrons after light absorption by graphene. The work may prove important for future graphene-based solar cells. Amaia Zurutuza, Amaia Pesquera and Alba Centeno made the graphene for our collaborators at ICFO (Barcelona), MIT, and the Max Planck Institute for polymer physics.

Graphene absorbs light of all colors,
ranging from the ultraviolet to far infrared. When graphene absorbs a
photon, which is a particle of light, a conducting electron is
created in the graphene. The electron is free to move and carry
electricity. Such a photoabsorption process is the key process in
solar cells and photodetectors.

Together with the world-renowned groups
of Koppens (ICFO), Levitov (MIT), and Bonn (Max Planck) we have shown that conducting
electrons in graphene multiply as they move, producing more
conducting electrons. Essentially, instead of losing energy to heat the
graphene crystal, which is what would happen in most other materials,
in graphene the electrons give their energy to promote other
electrons to the conduction band.

The project is a show of Graphenea's wide multinational scientific collaboration. The experiment was designed at ICFO in Barcelona, carried out at Amsterdam and Mainz (Max Planck), and the experimental findings explained in detail with the help of theoretical physicists from MIT. Graphenea remains the supplier of choice for high quality graphene to scientists worldwide.

It's not the first time that Graphenea publishes high level scientific papers. Last year, our graphene was featured in Nature, when we showed that graphene can support surface plasmons, essentially guiding light waves along the graphene sheet. In that case we also collaborated with the Koppens group, as well as with the group of Hillenbrand here at nanoGune, the parent institute that spun off Graphenea.

"We at Graphenea work to provide the best materials for the research community and the industry", says Jesus de la Fuente, our CEO. "Our close collaboration with research scientists at the cutting edge continues to bear fruit for both sides".